bubdioi



('No Model.) 4Shets-Sheet 1.

G'. BUB-DICK.

SEWING MACHINE.

No. 268,458. Panama Dec. 5.1882.

WITNESSES INVENTOR TMNE S N. PETERS Plwlu-Lilhcgnphnr, Washin ton, DC.

('No Model.) I 4 sheetq heet 2.

G. BURDIGK. sBwme MACHINE.

No. 268,458. Patented Dec. 5, 1882.

INVENTOR ATTORNEYS N. PETERs. Phammhcgn mr. washm mn. D. C.

4 Sheets-Sheet 3.

(No Model.)

G. BURDIGK. SEWING MACHINE.

Patented Dec. 5

INVEN'I'OR 1 41i ATTORNEYS iv, PETERS. Pbololilhugnphun wimin ion, n.0,

(-No Model.) 4 Sheets-Sheet 4.

G. BURDI'GK.

SEWING MACHINE. No. 268,458. Patented Dec. 5, 1882.

WITNESSES A ffvrneya N. m'ena Fholo-Lithagngher. w hinwn. n. c

tached to said shaft D.

UNITED STATES PATENT OEETG.

GEORGE BURDIOK, OF CLEVELAND, OHIO, ASSIGNOE OF ONE-HALF TO LORENPRENTISS, CHARLES M. VORGE, AND SEYMOUR O. PRENTISS,

OF SAME PLACE.

SEWING-MACHINE.

' SPECIFICATION forming part of Letters Patent No. 268,458, datedDecember 5, 18 82.

. Application filed March 16, 1882. (No model.)

1" 0 all whom it may concern Be it known that I, GEORGE BURDIGK, ofCleveland, in the county of (Juyahoga and State of Ohio, have inventedcertain new and useful Improvem cuts in Sewing-Machines; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use the same.

My invention relates to sewing-machines; anditconsistsin the peculiarconstruction of the same, as will be hereinafter fully set forth andclaimed.

In the drawings, Figure 1 is a view in side elevation of a machineconstructed according to my invention. Fig. 2 is aplan view of the underside ofthe bed-plate, showing the shuttledriving and feed-operatingpitman and lever and the manner of operating the same. Figs. 3, 4, 5, 6,7, 8, 9, 10, 11, 12, and 13 are detached views of some of the parts ofmy machine, showing their construction more clearly.

A is the bed-plate of my machine. B is the standard, andU is thehorizontal arm, which extends from the upper end of the standard B, asis usual in sewing-machines.

My machine is driven by means of power applied to the wheel D, which isdetachably secured to the horizontal driving-shaft D by the followingdevices A collar, D issecurely at is provided with a pin, a, which islooselyjournaled in the collar, one of its ends extending out and beingprovided with a head or knob, so as to be grasped by the. operator, andthe other end engaging, when in operation,with a hole, I), in the wheelD, it being kept in place in said hole 11 by means of a spring, 0. NVhenit is desired to disengage the pin a. frointhe hole b the said pin ispulled outward.

To the collar D is attacheda stud, cl, which extends within the boreofthe collarand enters the slot 0 to be moved backward and forward alimiteddistance. Aslot, 0, located at right angles to the slot 0,connects with the latter, and hence when the pin a is retracted andgiven a partial rotation the stud will engage the transverse slot 6 andretain the pin out of contact with the wheel D,t-hereby allowing theThis collar D in turn means of the spring 0. 6o

The horizontal shaft D imparts motion to a vertical shaft, E, by meansof miter-gears.

To the lower end of the shaft E is secured acam, E, which engages withand acts to operate the feed-lever E giving said lever a longitudinalreciprocating motion. The lever E is kept in contact with said cam E bymeans of a spring, E.

f is a pivoted bearing, through which the feed-lever E slides. 7

F is a bearing-shoulder, constituting an inclined plane formed on aplate or bar pivoted to the under side of the bed-plate A, and madeadjustable by means of an arm, F, and thumbscrew g, extending up througha curved slot in the bed-plate A; The function of the inclined plane Fis to cause the rounded end h of the lever E to engage with it (whensaid lever is being pushed outward by the cam E) and act in connectionwith the spring E to give to the feed-lever E a transverse reciprocatingmotion, which is communicated to the feed-bar F This motion may belengthened or shortened by adjusting the inclined plane F, which willact to lengthen 0r shorten the feed and stitch. 8 5 The up-and-downmotion of the feed-bar F is imparted to it by means of an adjustable inclined plane, j, attached to the shuttle-carrier H, (see Fig. 1],wherein it will be observed that a screw extends down from the inclinedo plane through the plate H, and is provided with nuts for retaining theinclined plane in any desired adjustment.) One end of the inclined planej is attached to the shuttle-carrier, and the arm V of the inclinedplane constitutes a spring, the tendency of which is to keep the inclinein its raised position. To the free end of the incline is secured ascrew-threaded stud, V by means of a pin the end of the lever, and thusprevent any looseness or rattling in the parts.

G is a crank, which is also secured to the lower end of the shaft E,below the cam E. This crank G acts to operate the shuttle lever orpitman G, which in turn is secured to and operates the shuttle-carrierH, giving to the samealongitudinal reciprocating motion. The shuttlelever or pitman G is made adjustable, one means of adjusting it beingshown in the drawings, Figs. 2 and 12, which consists of a hollowsplitscrew or bolt, G the head of which is pivoted to the shuttle carrier H,and

a nut, i, having a tapering female screw-thread, which engages with thethread on the bolt G and, when the end of the pitman G is entered in thehollow part or socket of the bolt G acts to clasp said end tightly, andthus, by moving the said end of the pitman G back or forth in saidsocket, it may be adjusted, and

held in the desired position. Any wear occurring between the parts maybe thus quickly and easily taken up and the shuttle-carrier timed to themovement of the needle.

I is a crank-wheel securely attached to the forward end of thehorizontal shaft 1). k The wrist and roller 70 of this crank-wheeloperate to drive the needle-bar by working in a heartcam, as is usual inmachines employingacrankwheel to drive the needle-bar. This crankwheelis made cam-shaped, as shown in Fig. 5,

which allows it to impart to the bar J a vertical reciprocating motion,which motion is in turn communicated to the take-up K by means of thehook lon the lower end of the bar J. The take-up is kept in contact withsaid hook I by means of a spiral spring, at, one end of which engageswith a small hole in said takeup, the other end being secured in a holein the head of a pin, m, said pin m acting as a pivot or fulcrum for thetake-up and as a means for securing it in place. The pin m is in turnheld in place by means of a set-screw, n, and said pin may be turned ineither direction to increase or decrease the tension of the spring m,andthen secured in the desired position by said set-screw n.

K is an arm extending out in the rear of the pin m, and formed in onepiece with the take-up K. Said arm reciprocates vertically to s arm 0.The armK is provided with a hole,

0, which, when the arm is at its lowest point, is in a direct line withholes P in the stud L. This allows of the thread being easily passedthrough the said holes when in this position. The function of this arm Kis to unwind the thread from the spool as fast as needed, thus takingthe strain from the needle.

My tension device consists of a piece of metal, M, adj ustably securedto the side of the face-plate by means of a set or thumb screw, 1, whichpasses through a slot, 8, in the piece M. The upper end of the pieceM ismade hollow or bored out to a considerable distance, as shown in Eig. 7,and is provided with two disks, tand t. The faces of these disks ,t andt, which are contiguous, are polished,the edges of the same beingslightly chamfered at the point where thetwo disks meet. I provide aslot, to, cut at a right angle to the bore of the piece M. This allowsof the thread being passed between the two disks t and it from theoutside. The tension of the thread is governed by means of athumb-screw, N, and spring '0, the said spring 1; resting on the upperdisk, t, and the set-screw N pressing on the spring '0.

Myobject in making the piece M adjustable is to allow of the slot at anddisks taud it being mover. nearer to or farther from the take-up K, andthus adapt it to different thicknesses of cloth or goods being sewed bythe machine. The manner of threading my machine is as follows: The endof the thread is first passed through one of the holes Pin the slottedstud L and then through the hole 0 in the arm K, and then out throughtheother hole P, and from thence through the hook O in the side of thehorizontal arm (J, then between the disks t and t and hook y through thehole in takenp K, after which it passes to the needle. When the take-upK is moving in a downward direction the arm K is moving upward andpullingthe thread from the spool, and when the take-up K is movingupward the arm K is moving down, and the thread is slacked or fed to thetake-up K. This operation is repeated at every up and down stroke of.the

needle-bar and take-up. Thus the only strain on the take-up K is theforce required to pull the thread through the tension-disks t and t andthe 'necessary strain employed in tightening the stitches.

What I claim is-- 1, In a sewing-machine, the combination, with thedriving-shaft and driving-wheel loosely journaled thereon, of a collarsecurely attached to the driving-shaft, a pin journaled in said collarand adapted to be reciprocated therein, said pin being provided with anL- shaped slot, a stud secured to the collar and arranged to extend intosaid slot, and a spring for forcing the pin in one direction,substantially as set forth. V

2. In a sewing-machine, the combination, with a cam secured to the lowerend of a vertical shaft, of a feed operating lever and a spring forretainingitin contact with said cam,

and an adjustablearm provided with an inclined plane, against which.engages the rear end of the feed-operatin g lever, substantially as setforth.

3.In a sewingmachine, the combination, with a feed-operating leverconstructed with a lateral extension at its rear end provided withrounded edges, of an adjustable arm provided with an inclined plane,against which engages the lateral extension of the feed-operating leverand imparts lateral movement thereto, substantially as set forth.

4. In a sewing-machine, the combination, with a feed-operating lever anda cam for reciprocating the same, of an arm formed with a shoulderconstituting an inclined plane, against which engages the feed-operatinglever, and means for adjusting said arm, substantially as set forth.

5. In a sewing-machine, the combination, with a shuttle-operating pitmanor lever and ashuttle-carrier, of a split, hollow, and tapering boltjournaled at one end to theshuttlecarrier and receiving the pitma-n inits other end, and aunt forclamping the hollow bolt upon the end of thepitman, substantially as set forth. i r

6. In a sewing-machine, the combination, with a'take-up provided with apull-off arm or extension, of stationary thread eyes or passages locatedon opposite sides of said pull-off, substantially as set forth.

7. In a sewing-machine, the combination, with an independent take-upprovided with a pull-off arm or extension, of a tension-regulatin gdevice arranged to engage the thread between the pull-ofl' and thetake-up, substantially as set forth.

8. In a sewing-machine, the combination, with the combined take-up andpull-off, of the needle-bar J, curved lifting-finger Z, and heartshapedcam I, substantially as set forth.

9. In a sewing-machine, the combination, with a take-up provided with apull-off arm or extension, of a slotted stud provided withthread-passages, substantially as set forth.

10. In a sewingmachine, the combination, with a take-u p provided with apull-off arm or extension, of a pivotal pin, m, provided with a slottedhead, a set-screw, n, to retain the pivotal pin in any desired rotaryadjustment, and a spring, m, one end of which is secured to the take-upand its opposite end to the head of the pin m, substantially as setforth.

11. In a sewingmachine, the combination, with the take-up provided witha pull-oft arm or extension,of a tension device adj ustably secured tothe machine and adapted. to receive the thread from the pull-off and tobe adjusted to regulate the length of thread between the tension deviceand take-up, substantially as set forth.

12. Ina sewing-machine, a tension device consisting in thecombination,with the hollow piece M, having a screw-slot, s, and athread slot, at, of the disks 2? t and suitable means for, increasing ordiminishin gthe pressure between said disks, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of' two subscribing witnesses.

GEORGE BURDIGK.

Witnesses:

EMMA O. WRIGHT, r W. E. DONNELLY.

